BAE SYSTEMS WM & BC SERIES

GENERAL DESCRIPTION


BROADBAND MONOPOLES - WM & BC SERIES

photo BAE Systems WM & BC Series Designed for long distance omnidirectional operation, RFS monopoles are vertically polarized and are characterised by low angle radiation patterns, and a wide selection of frequency ranges and bandwidths.

With high power handling for general HF communication applications, these antennas provide an economical solution, with long term reliability and stability of electrical characteristics. Particular attention has been paid to the matching of dissimilar metals to minimise electrochemical corrosion as well as noise and intermodulation components.

Monopole antennas require a radial ground mat system for specified performance. Ground mat kits are supplied with each antenna. The radiator comprises a biconical cage of stranded marine grade stainless steel wire.

The standard support structure is a guyed triangular galvanised steel mast supported on a heavy duty ceramic insulator. The insulated tower base is fitted with a horn gap for lightning protection. For every severe environments an option is available with the WM series for wind rating of 305 k/hr.

The BC Series are essentially similar, in performance and mechanical arrangement, to the WM Series. However, they are more economical, and simpler to erect, at the expense of a reduction in bandwidth.

RFS offers a complete planning and installation service as well as maintenance facilities for all products.

Construction (WM and BC Series)

RADIATOR ELEMENTS - constructed from marine grade stainless steel.

GUY ASSEMBLIES - galvanized steel, with heavy duty fail-safe insulators isolating conducting sections.

SUPPORT MASTS - Heavy duty welded galvanized steel masts.

EARTH MAT - 64 radials of 16 SWG (1.6 mm) copper wire.

Wind Ratings

Cyclonic: 250 km/hr

Extreme Cyclonic: 305 km/hr (optional)

Feeder Connections

A range of cable terminals and mounting fittings can be supplied, or accommodated, to specification. These include EIA series or Type N.

TECHNICAL SPECIFICATIONS
MODEL
WM230 WM330 WM430 BC1.69 BC415 BC630
Electrical
Pattern Azimuth
Omnidirectional
Elevation
refer diagrams
Gain
4 dBi nominal
Impedance Nominal
50 ohm unbalanced
VSWR
<2.5:1 from 2.0 to 2.15 MHz
<2.0:1 from 2.15 MHz up
Polarization
Vertical
Input power
Max 40 kW average; 80 kW PEP
Mechanical
Band (MHz) 2 - 30 3 - 30 4 - 30 1.6 - 9 4 - 15 6 - 30
Mast (m) 34 25 19 33 12 7
Guy radious (m) 23 17 12 19 8 6
Earth Mat Radius (m) 38 26 20 55 23 19
Packed Vol. (cu. m) 9 7.5 5.6 2.2 2.8 1.5
Packed Weight (kg) 1320 1090 820 1200 970 110
Mast Sections
MS3 (steel), 3 m long, 30 cm side, 30 kg/m
Specifications may change without notice

ELEVATION RADIATION PATTERNS
BAE Systems WM & BC Series elevation radiation patterns


GAIN
BAE Systems WM & BC Series gain


ORDERING INFORMATION
Example Model
Always 3 Input connection Always 0
WM230*310 WM230 * 3 1 0





1 N Type




2 7/8" Strap




3 1 5/8" Strap




4 3 1/8" Strap